ATE110485T1 - OPTICAL PLATE AND REGULATION OF THE MOVEMENT OF ITS OPTICAL POINT OF LIGHT. - Google Patents
OPTICAL PLATE AND REGULATION OF THE MOVEMENT OF ITS OPTICAL POINT OF LIGHT.Info
- Publication number
- ATE110485T1 ATE110485T1 AT89904609T AT89904609T ATE110485T1 AT E110485 T1 ATE110485 T1 AT E110485T1 AT 89904609 T AT89904609 T AT 89904609T AT 89904609 T AT89904609 T AT 89904609T AT E110485 T1 ATE110485 T1 AT E110485T1
- Authority
- AT
- Austria
- Prior art keywords
- optical
- track
- movement
- optical spot
- regulation
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title abstract 6
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Moving Of Head For Track Selection And Changing (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Optical Head (AREA)
- Moving Of Heads (AREA)
Abstract
The method of the present invention comprises detecting a recording pattern, which is different for each track, in each of track groups consisting of a predetermined number N of tracks recorded in advance on an optical disk (1), generating a tracking signal SET whose signal level changes on the positive and negative sides of a target track TO as the center, and moving the optical spot to the target track TO on the basis of this tracking signal SET. In this manner, it becomes possible to prevent uncontrollable movement of the optical spot and align the optical spot to a desired recording track within a short period of time.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63096510A JP2646645B2 (en) | 1988-04-18 | 1988-04-18 | Optical spot moving device for optical disk |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE110485T1 true ATE110485T1 (en) | 1994-09-15 |
Family
ID=14167122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT89904609T ATE110485T1 (en) | 1988-04-18 | 1989-04-18 | OPTICAL PLATE AND REGULATION OF THE MOVEMENT OF ITS OPTICAL POINT OF LIGHT. |
Country Status (7)
Country | Link |
---|---|
US (1) | US5144605A (en) |
EP (1) | EP0404942B1 (en) |
JP (1) | JP2646645B2 (en) |
KR (1) | KR100195557B1 (en) |
AT (1) | ATE110485T1 (en) |
DE (1) | DE68917720T2 (en) |
WO (1) | WO1989010614A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0210579A (en) * | 1988-06-29 | 1990-01-16 | Hitachi Ltd | Optical information recording/reproducing device |
JP2796344B2 (en) * | 1989-04-12 | 1998-09-10 | 株式会社日立製作所 | Optical information recording medium and recording / reproducing device |
JPH03185640A (en) * | 1989-12-15 | 1991-08-13 | Hitachi Ltd | Optical information recording medium and recording and reproducing device |
JPH04254919A (en) * | 1991-02-07 | 1992-09-10 | Hitachi Ltd | Tracking controller |
JP3243800B2 (en) * | 1991-06-07 | 2002-01-07 | ソニー株式会社 | Method of forming gray code of optical disk medium and track address reproducing apparatus |
US5345435A (en) * | 1991-08-30 | 1994-09-06 | Sony Corporation | Optical disc and method for recording on optical disc |
US5764457A (en) * | 1992-01-10 | 1998-06-09 | Deutsche Thomson-Brandt Gmbh | Cassette including a recording medium for a recording apparatus |
KR940011229B1 (en) * | 1992-07-07 | 1994-11-29 | 현대전자산업 주식회사 | Optical disk apparatus operating system |
KR19980029035A (en) * | 1996-10-25 | 1998-07-15 | 김영환 | Tracking Error Generation Circuit Using Phase Difference Detection Method |
JP2001253114A (en) * | 2000-03-13 | 2001-09-18 | Fuji Photo Film Co Ltd | Method and apparatus for regulating quantity of light in image exposing recorder |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3919697A (en) * | 1974-06-26 | 1975-11-11 | Battelle Development Corp | Data record tracking using track identifying information in the gaps between recorded data groups |
US4032984A (en) * | 1975-04-28 | 1977-06-28 | Burroughs Corporation | Transducer positioning system for providing both coarse and fine positioning |
NL7702570A (en) * | 1977-03-10 | 1978-09-12 | Philips Nv | MAGNETIC DISK MEMORY AND MAGNETIC DISK FOR THAT MEMORY. |
US4352131A (en) * | 1980-02-29 | 1982-09-28 | U.S. Philips Corporation | Memory disc addressing device |
JPS58218079A (en) * | 1982-06-14 | 1983-12-19 | Toshiba Corp | Positioning system of head |
JPS58175169A (en) * | 1982-04-06 | 1983-10-14 | Pioneer Electronic Corp | Controller for relative positions of recording track and pickup in information reproducing device |
EP0125019A1 (en) * | 1983-04-05 | 1984-11-14 | Pioneer Electronic Corporation | Device for controlling recording track jump operations |
US4977472A (en) * | 1988-03-28 | 1990-12-11 | Seagate Technology, Inc. | Servo address system |
-
1988
- 1988-04-18 JP JP63096510A patent/JP2646645B2/en not_active Expired - Fee Related
-
1989
- 1989-04-18 WO PCT/JP1989/000414 patent/WO1989010614A1/en active IP Right Grant
- 1989-04-18 EP EP89904609A patent/EP0404942B1/en not_active Expired - Lifetime
- 1989-04-18 US US07/449,933 patent/US5144605A/en not_active Expired - Fee Related
- 1989-04-18 DE DE68917720T patent/DE68917720T2/en not_active Expired - Fee Related
- 1989-04-18 AT AT89904609T patent/ATE110485T1/en not_active IP Right Cessation
- 1989-12-18 KR KR1019890702373A patent/KR100195557B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE68917720T2 (en) | 1995-01-12 |
DE68917720D1 (en) | 1994-09-29 |
EP0404942B1 (en) | 1994-08-24 |
KR100195557B1 (en) | 1999-06-15 |
KR900701008A (en) | 1990-08-17 |
EP0404942A4 (en) | 1992-03-18 |
US5144605A (en) | 1992-09-01 |
WO1989010614A1 (en) | 1989-11-02 |
EP0404942A1 (en) | 1991-01-02 |
JPH01267877A (en) | 1989-10-25 |
JP2646645B2 (en) | 1997-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
REN | Ceased due to non-payment of the annual fee |